Pierre,
What file are you looking in for that? Terry Yingling's PMDG procedures pack for cycle 0505 LPPT.txt file hasn't got any "//"s in it...
I think it needs to be re-iterated for all newer PMDG 737 owners (and probably some of us that have had it for a while):
The PMDG FMC AIRAC cycle updates come in two parts;
(
NOTE: urls point to the pages hosting the correct downloads, not the downloads themselves)
To apply a complete AIRAC cycle update to the PMDG FMC, download the update zip files (for the same AIRAC cycle! 0505 is current at the time of writing...), then install the Airway update first (using the navdata installer, so click "Next" lots), then apply the Procedures update
over the top of the Airway update (manual install, unfortunately).
While the Airway updates contain some procedures, it's not very many. The Procedures updates do all the hard work in that respect.
Finally, Terry has a habit of applying "fixes" to his Procedure updates mid-cycle, so if your are having problems with procedures on your FMC, download a new copy of the Procedures update (and apply it, o' course) and test with the new data before panicking...